obama, and ca, this tor wrote "the obamas," a reporter with the "new york times," and david marines's first half on president obama, barack obama: the story" came out as well. >> guest: yes, whenever there's a sitting president, it's a boom for publishers who jump on the wagon and publish as much books as possible. it's interesting to me in particular because it delves into the early life of barack obama from his childhood to a student in new york to early organizing days and he did a thorough job in terms of talking with a whole lot of different people who knew the president in his early life. cantor also clearly did quite a bit of reporting and investigation with her book about the marriage between barack obama and michelle obama, and rachel, from what i understand, took a larger view looking at the first lady and her larger ancestry and putting together a larger story as a result. >> host: now, bob -- >> guest: now, those -- >> host: go ahead, please. >> guest: no, i was just going to say of the three, my favorite was the marines. it was exhaustive and exhausting. there's every det